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Panaracer Spike Tires


PANARACER SPIKE F

The Panaracer 26 x 1.95" Spike F is a designed as a front tire and is said on the tire patch label that is made of 100% hard compound. The Spike is made in Japan, only with the Kevlar folding bead. Its tread pattern repeats at 22mm intervals. The pattern itself is simple enough and seems to share some stylistic aspects with the early OnZa Porcupine tires, but instead of relying on a round cone, the Spike uses a square pyramid shape with a blunt top. The base of the square is roughly 10mm x 10mm, rising to become 5mm x 5mm at the top of its 8.5mm height. There are two rows of blocks in each repetition. One row is made of a pyramid block spaced 2.5mm on each side of the centerline. The second row has rectangular blocks approximately 13mm vertical x 9mm horizontal in size at the edges of the tread leaving 29mm of clear area between these edge blocks. The Spike F is available in a Skin sidewall or a Black tinted casing fabric to look like a sidewall. We found the Spike F actually had the hardest rubber compound we tested showing a durometer hardness of 75/A.

Spike F 26 x 1.95" - Kevlar/Skin/Black $ Price in Catalog
Spike F 26 x 1.95" - Kevlar/Black/Black $ Price in Catalog

PANARACER SPIKE R

This is the mated rear to the Spike F. Made in Japan, the 26 x 2.00" tire is said to have 100% hard compound. The Spike R tread pattern repeats at 45mm intervals and is based on two type of center blocks flanked by edge blocks. A pair of hexagonal blocks 12mm in diameter at the base straddle the center line. These hex blocks have a conical shape reducing in diameter to 7mm across at the top. Two of a 13mm by 7mm rectangle placed at an outward angle from the second row At 1.5mm from the centerline at their nearest, their outermost edge is 13.5mm from the centerline. Long, 21mm by 14mm edge blocks provide the outer turning support. Pitched at an angle, these have a much large base with sidewall support and leave a 26.5mm wide area in the middle of the tread open. These edge blocks exist between each pair of the central hex and rectangular blocks. The Spike R is available in a Skin sidewall or a Black tinted casing fabric to look like a sidewall. We found the Spike R, like the Spike F, actually had the hardest rubber compound we tested showing a durometer hardness of 75/A.

Spike R 26 x 2.00" - Kevlar/Skin/Black $ Price in Catalog
Spike R 26 x 2.00" - Kevlar/Black/Black $ Price in Catalog





In-depth Information About Metals

Aluminum
Aluminum is extracted electrolytically from bauxite ore. It is made by the electrolysis of aluminum oxide which is found in larger concentrations within bauxite ore. Bauxite is a mixture of the hydroxides of aluminum, together with other impurities such as oxides of iron, titanium, and silicon. Bauxite is produced by the weathering and change of aluminum silicate rocks usually found in tropical and semitropical regions where climate has produced an accelerated weathering process. Bauxite is not a rare ore and is widely available in the US, the Caribbean, and Europe. Approximately 4 pounds of read the full article...

Beryllium
Beryllium is a specialty metal that is steel-grey metal in color, with an extremely low density, making it very light weight. At 1.85 grams to the cubic centimeter, its density compares to that of magnesium. It is also a high strength metal, making it possible to design light weight, thin membered parts with ahigh stiffness. A column made of beryllium to support a load placed directly downward on top of it, will have a greater load carrying capacity, and be lower in weight than any other metal of equal size.

Until the 1950's beryllium was used read the full article...

Titanium
The element titanium was discovered in 1763 by an English cleric, William Gregor who was an amateur chemist with an inquiring mind. It was in the black sands of Cornwall that he discovered the new element that had up to that time, attracted little scientific interest. A few years later, an Austrian, Klaproth, extracted the same element from an ore widely known as "rutile", which is a mineral consisting of titanium dioxide (one titanium atom, two oxygen atoms), that is a reddish-brown substance with a slight metallic luster. While rutile is the highest grade read the full article...

Metallurgic Hardness Testing
There are three types of tests used with accuracy by the metals industry,they are the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. Hardness is the property of a metal which gives it the ability to resist being permanently deformed (bent, broken, or have its shape changed), when a load is applied. The greater the hardness of the metal, the greater resistance it has to deformation. Since the definitions of metallurgic ultimate strength and hardness are rather similar, it can generally be assumed read the full article...


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